资料

【Java】Scanner类中的方法

作者zjl 2010年3月25日

Method Summary
`void`	`close()` Closes this scanner.
`Pattern`	`delimiter()` Returns the `Pattern` this `Scanner` is currently using to match delimiters.
`String`	`findInLine(Pattern pattern)` Attempts to find the next occurrence of the specified pattern ignoring delimiters.
`String`	`findInLine(String pattern)` Attempts to find the next occurrence of a pattern constructed from the specified string, ignoring delimiters.
`String`	`findWithinHorizon(Pattern pattern, int horizon)` Attempts to find the next occurrence of the specified pattern.
`String`	`findWithinHorizon(String pattern, int horizon)` Attempts to find the next occurrence of a pattern constructed from the specified string, ignoring delimiters.
`boolean`	`hasNext()` Returns true if this scanner has another token in its input.
`boolean`	`hasNext(Pattern pattern)` Returns true if the next complete token matches the specified pattern.
`boolean`	`hasNext(String pattern)` Returns true if the next token matches the pattern constructed from the specified string.
`boolean`	`hasNextBigDecimal()` Returns true if the next token in this scanner’s input can be interpreted as a `BigDecimal` using the `nextBigDecimal()` method.
`boolean`	`hasNextBigInteger()` Returns true if the next token in this scanner’s input can be interpreted as a `BigInteger` in the default radix using the `nextBigInteger()` method.
`boolean`	`hasNextBigInteger(int radix)` Returns true if the next token in this scanner’s input can be interpreted as a `BigInteger` in the specified radix using the `nextBigInteger()` method.
`boolean`	`hasNextBoolean()` Returns true if the next token in this scanner’s input can be interpreted as a boolean value using a case insensitive pattern created from the string “true\|false”.
`boolean`	`hasNextByte()` Returns true if the next token in this scanner’s input can be interpreted as a byte value in the default radix using the `nextByte()` method.
`boolean`	`hasNextByte(int radix)` Returns true if the next token in this scanner’s input can be interpreted as a byte value in the specified radix using the `nextByte()` method.
`boolean`	`hasNextDouble()` Returns true if the next token in this scanner’s input can be interpreted as a double value using the `nextDouble()` method.
`boolean`	`hasNextFloat()` Returns true if the next token in this scanner’s input can be interpreted as a float value using the `nextFloat()` method.
`boolean`	`hasNextInt()` Returns true if the next token in this scanner’s input can be interpreted as an int value in the default radix using the `nextInt()` method.
`boolean`	`hasNextInt(int radix)` Returns true if the next token in this scanner’s input can be interpreted as an int value in the specified radix using the `nextInt()` method.
`boolean`	`hasNextLine()` Returns true if there is another line in the input of this scanner.
`boolean`	`hasNextLong()` Returns true if the next token in this scanner’s input can be interpreted as a long value in the default radix using the `nextLong()` method.
`boolean`	`hasNextLong(int radix)` Returns true if the next token in this scanner’s input can be interpreted as a long value in the specified radix using the `nextLong()` method.
`boolean`	`hasNextShort()` Returns true if the next token in this scanner’s input can be interpreted as a short value in the default radix using the `nextShort()` method.
`boolean`	`hasNextShort(int radix)` Returns true if the next token in this scanner’s input can be interpreted as a short value in the specified radix using the `nextShort()` method.
`IOException`	`ioException()` Returns the `IOException` last thrown by this `Scanner`‘s underlying `Readable`.
`Locale`	`locale()` Returns this scanner’s locale.
`MatchResult`	`match()` Returns the match result of the last scanning operation performed by this scanner.
`String`	`next()` Finds and returns the next complete token from this scanner.
`String`	`next(Pattern pattern)` Returns the next token if it matches the specified pattern.
`String`	`next(String pattern)` Returns the next token if it matches the pattern constructed from the specified string.
`BigDecimal`	`nextBigDecimal()` Scans the next token of the input as a `BigDecimal`.
`BigInteger`	`nextBigInteger()` Scans the next token of the input as a `BigInteger`.
`BigInteger`	`nextBigInteger(int radix)` Scans the next token of the input as a `BigInteger`.
`boolean`	`nextBoolean()` Scans the next token of the input into a boolean value and returns that value.
`byte`	`nextByte()` Scans the next token of the input as a `byte`.
`byte`	`nextByte(int radix)` Scans the next token of the input as a `byte`.
`double`	`nextDouble()` Scans the next token of the input as a `double`.
`float`	`nextFloat()` Scans the next token of the input as a `float`.
`int`	`nextInt()` Scans the next token of the input as an `int`.
`int`	`nextInt(int radix)` Scans the next token of the input as an `int`.
`String`	`nextLine()` Advances this scanner past the current line and returns the input that was skipped.
`long`	`nextLong()` Scans the next token of the input as a `long`.
`long`	`nextLong(int radix)` Scans the next token of the input as a `long`.
`short`	`nextShort()` Scans the next token of the input as a `short`.
`short`	`nextShort(int radix)` Scans the next token of the input as a `short`.
`int`	`radix()` Returns this scanner’s default radix.
`void`	`remove()` The remove operation is not supported by this implementation of `Iterator`.
`Scanner`	`reset()` Resets this scanner.
`Scanner`	`skip(Pattern pattern)` Skips input that matches the specified pattern, ignoring delimiters.
`Scanner`	`skip(String pattern)` Skips input that matches a pattern constructed from the specified string.
`String`	`toString()` Returns the string representation of this `Scanner`.
`Scanner`	`useDelimiter(Pattern pattern)` Sets this scanner’s delimiting pattern to the specified pattern.
`Scanner`	`useDelimiter(String pattern)` Sets this scanner’s delimiting pattern to a pattern constructed from the specified `String`.
`Scanner`	`useLocale(Locale locale)` Sets this scanner’s locale to the specified locale.
`Scanner`	`useRadix(int radix)` Sets this scanner’s default radix to the specified radix.

使用方法：

improt java.util.Scanner;
   ….
   Scanner s=new Scanner(System.in);
   int i=s.nextInt();//从键盘输入整数

貌似是jdk1.5版本以后才出现的,据说比较好用的输入方法,官方文档中拷贝的,顺便学英文,呵呵

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一条评论

Exercise Balls说道：

2010年5月9日下午7:15

What a great resource!

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